Over the past few days I've done a little experiment on the actual impact of having 1x80MM intake fan at the front of the case. The results surprised me allot. Test Setup: Intel Core 2 Duo E6300 @ Stock speeds with stock cooler Geil 2GB DDR2 800mhz Inno3D nVidia 8800GTS 320MB OC'ed to 650mhz core, 1404mhz memory. Stock cooler. 2x250GB SATA II HDDs 520W Corsair HX PSU Cooling: 1x120MM fan at the top back, 1x120MM fan at top front (in the drive bays), 1x80mm in the floppy drive bays. I ran the PC for 24 hours without a bottom intake fan and recorded the results using Riva Tuner, and Speedfan then installed a 80mm fan at the front and recorded the results. The results were as follows: No fan: Average Core temp (GPU) = 69C Ambient Temperature = 52C CPU temp = 37C With Fan: Average Core temp(GPU) = 58C Ambient Temperature = 46C CPU temp = 29C Before the experiment I didn't think the impact would be as big, but it turns out that the fan worked wonders. The whole reason of me posting this is to just say...well...erm how important an intake fan is.